Ukraine destroying Russian jets with Australia’s flat-pack cardboard drones
ftfy
Anyway, looks easy to copy. Soon: Russian/Iranian/Chinese/North-Korean flying cardboards?
Hobbyists have been building foam core planes for years. There is an interesting youtube channel that has made plenty, FliteTest. They have built models to drop pumpkins and watermelons, so they can be build to haul a bit of weight.
One of my personal favorites is the Thunderquak from Darkwing Duck.
https://youtube.com/watch?v=A68pu7EYhYc&pp=ygUSRmxpdGVUZXN0IGRhcmt3aW5n